Originally posted by Baron von Tansley:

I literally just experienced this, except with a troll raid. I'm devastated I lost my two-star pig. I wish the AI would prioritize attacking me adjacent to them shooting arrows over pigs/structures.

I've found that Mobs (Trolls, Greydwarfs,and such) will go after you if you are in a certain range, and its possible to reach you. Again beef up your defences.

To get another starred boar, go back to the area where you found the 2 star boar, find the rune stone I mentioned above. If you keep clearing it you should find another starred boar.